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Last Updated 11/04/19codes The city government of Redwood City will approve ADUs under California's statewide mandated regulations.
City Hint: The city has not yet responded to requests for ADU permit volumes for the past year, but they will be provided here once response has been received.
Number of ADUs allowed:
One ADU per primary home.
AB68 & AB881 Update: Properties which convert existing space to create ADUs may be eligible for one ADU -AND- one JADU.
Types of ADUs allowed:
Detached, Attached, junior ADU.
Minimum Net lot area. (A) R-0 and R-1 zoning districts require eight thousand five hundred square feet. (B) R-2 zoning district and residential DSP blocks require five thousand square feet.
AB68 & AB881 Update: Properties will not be subject to minimum lot standards by ordinance or of the applicable zoning district.
The maximum allowable floor area for an ADU may be increased from 640 square feet to 700 square feet if an ADU is constructed to meet the California Building Code requirements for disabled access.
AB68 & AB881 Update: Properties will be allowed up to 850 square feet for a one bedroom or up to 1,000 square feet for a two bedroom ADU.
Setbacks of an ADU that is attached to or detached from the main house shall be subject to the minimum setback standards of the underlying zoning district. Additionally, minimum setback of six (6) feet shall be required between an accessory dwelling unit and any single-family dwelling or accessory buildings on the lot.
AB68 & AB881 Update: The maximum required setback for a detached new construction ADU shall be no more than 4 feet from the rear or side property lines.
One covered or uncovered space shall be required for the ADU. If uncovered, the ADU parking space may be located on a driveway within a required front, side or rear yard setback area. Tandem parking to meet the ADU parking requirement is permitted.
AB68 & AB881 Update: Properties which convert an existing garage will not be subject to replacement parking requirements.
Fire sprinklers shall be installed for the ADU.
Shape, materials and style:
An accessory dwelling unit shall be architecturally compatible with the architectural style and exterior paint and materials of the single family dwelling on the same lot.
Maximum building height is 28 feet and structures shall not exceed 2.5 stories. The building height of a detached accessory dwelling unit shall not exceed the building height of a single-family dwelling on the same lot.
Ministerial review process.
Number of Bedrooms:
Up to one (1) bedroom shall be permitted.
The accessory dwelling unit shall not be intended or offered for sale, nor sold, but may be rented. The property owner shall live on-site in either the main unit or the accessory dwelling unit.
SB13 Update: Owner-occupancy requirements for ADUs will be voided statewide for 5 years.
shall be exempt from the requirement of upgrading a water main.
SB13 Update: Local impact fees for ADUs will be reduced substantially statewide.
An accessory dwelling unit, commonly known as a second unit or in-law unit, is an attached or detached dwelling unit that is located on the same lot as a single family dwelling and provides complete living, sleeping, eating, cooking, and sanitation facilities
separate and independent of the main dwelling.
For lots that are greater than or equal to 10,000 square feet in the Residential Hillside (RH) or Residential Single-Family (R-1) Zoning Districts, the maximum allowable floor area for an ADU shall be 800 square feet and no more than two (2) bedrooms.
The homeowner may live offsite and rent out both the main house and the ADU due to:
a. A medical condition that requires residency elsewhere; or
b. The homeowner accepts a job transfer outside of the San Francisco Bay Area.
A detached ADU may be built within a required rear yard setback area provided that the ADU meets the following requirements:
a. Minimum Rear Yard Setback: 10 feet
b. Maximum Building Height: 14 feet
c. Maximum Wall Height: 9 feet
d. No more than 50% of the required rear yard setback area shall be covered by structures.
An Accessory Dwelling Unit (ADU) may be built on the same property as an existing or proposed single-family residence in the RH, R-1, R-2, R-3, R-4, and R-5 zoning districts.
AB68 & AB881 Update: ADUs will be allowed statewide in all single-family or multi-family zoning districts.
The front yard shall be subject to the minimum pervious area and stormwater requirements of the underlying zoning district.
Total lot coverage is limited to 40 percent of the lot area. Not more than 40 50 percent of the required rear yard shall be covered by any combination of accessory buildings or an accessory dwelling unit subject.
Residential Building Code:
The California Building Code (CBC) 2016 is adopted with the following amendment(s): 2428 to 2429
Redwood City Planning Division
Contact Planner Diana O'Dell. Counter Hours: 8AM-5PM (M/W/F), and 12:30PM-5PM (T/Th) (walk-ins welcome)
1017 Middlefield Road Redwood City, CA 94063
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Read Redwood City Housing Market Update
Redwood City officials taking aim at regulating Airbnb amid growth http://www.smdailyjournal.com/ 2017-11-18
Redwood City wants to see more secondary units built on lots ... www.mercurynews.com 2014-06-30
State Senator Bob Wieckowski In Conversation With Somanjana Chatterjee India Currents 2017-09-02
Customer since January, 2019
* upon completion of ADU
CONSTRUCTION COST ESTIMATE
* based on local average price per sqft
Appreciation Estimate = (Base Value: $) / (Home's Living Space: sqft) * (ADU's Living Space: sqft)
Rental Estimate = (Rent Per Sqft: $5.24) * (ADU's Living Space: sqft)
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